This might be off-topic (mods feel free to move if required) but I just noticed that the April 6-19 Eastern Canada (Western Canada & US may have similar sales) has the following coupons (not sure about the ratings / suitability for mhs):

Note that the 1st 2 have the same model number so it could be a misprint (or they could both really be the same). According to another website, the 24DC is 115Ah 12V. Don't have any other information on the others (I think the U1 is a 6V). If I go to the store, I'll look them up.

According to another thread on the forum, the Costco 6Vs (presumably the U1 from above) is actually a US Battery US2200 and they are about $75 each and are comparable to a Trojan T105. If I make it to Costco, I'll update the post (although keep in mind that this is also just what I'm seeing at my local Costco in Canada)